Seeing the whole 'corporate pride is fake' thing going around again, and I have a few thoughts to share on this;
1) those are usually organized by actual LGBTQIA+ allies at those companies, not just empty marketing- but that's my personal experience.
2) This is also the reason why you won't see it in countries which are actively hostile and make it actually illegal to be LGBTQIA+ aligned, not because they're 'selective'.
3) I'd rather have more, than less allies, but that's my personal take.